Rio Fly Fishing Saltwater Fishing Leaders RIO's Saltwater leaders an excellent general purpose saltwater leader for a multitude of species. The leaders are made of a medium stiff nylon and have a taper design that easily turns over typical saltwater patterns and copes with tough winds. The leader is made of a material that is easy to knot and has great knot strength.Each leader is 10ft long and available from 8lb (0.010") to 40lb (0.024")